Abacus

Period

c. 2700 BC

Map

Inventions map

An abacus, also called a counting frame, is a hand-operated calculating tool which was used from ancient times, in the ancient Near East, Europe, China, and Russia, until largely replaced by handheld electronic calculators, during the 1980s, with some ongoing attempts to revive their use. An abacus consists of a two-dimensional array of slidable beads. In their earliest designs, the beads could be loose on a flat surface or sliding in grooves. Later the beads were made to slide on rods and built into a frame, allowing faster manipulation.

Sources: Wikipedia — Abacus · CC BY-SA 4.0

Earlier and later events nearby

1. c. 3200 BCCuneiform
2. c. 2700 BCAbacusThis page
3. c. 2300 BCFounding of the Akkadian Empire
4. c. 1754 BCCode of Hammurabi
5. 539 BCFall of Babylon

Who ruled this land

States that held this place in the historical borders data (Cliopatria). Years are approximate, as fine as the data's snapshots (every few years to a century). Tap to open the map for that year.

Other maps for this period

• Inventions mapSilk